package com.landtool.controller;


import com.landtool.config.SysTemPropertyConfig;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;

import javax.websocket.*;
import javax.websocket.server.ServerEndpoint;
import java.io.IOException;
import java.util.concurrent.CopyOnWriteArraySet;

/**
 * @Description:
 */
@Controller
@ServerEndpoint(value="/websocket")
public class WebsocketServer {
    private static Logger log = LoggerFactory.getLogger(WebsocketServer.class);

    private static SysTemPropertyConfig sysTemPropertyConfig;

    @Autowired
    public void setChatService(SysTemPropertyConfig sysTemPropertyConfig) {
        WebsocketServer.sysTemPropertyConfig = sysTemPropertyConfig;
    }

    //静态变量，用来记录当前在线连接数。应该把它设计成线程安全的。
    private static int onlineCount = 0;
    //concurrent包的线程安全Set，用来存放每个客户端对应的MyWebSocket对象。
    private static CopyOnWriteArraySet<WebsocketServer> webSocketSet = new CopyOnWriteArraySet<WebsocketServer>();

    //与某个客户端的连接会话，需要通过它来给客户端发送数据
    private Session session;

    /**
     * 连接建立成功调用的方法
     */
    @OnOpen
    public void onOpen(Session session) {
        this.session = session;
        session.setMaxTextMessageBufferSize(22011860);
        session.setMaxIdleTimeout(9000);
        log.info(String.valueOf(session.getMaxTextMessageBufferSize()));
        webSocketSet.add(this);     //加入set中
        addOnlineCount();           //在线数加1
        log.info("有新连接加入！当前在线人数为" + getOnlineCount());
        try {
            sendMessage(Shipping.strCurMB);
//            sendMessage("123");
        } catch (IOException e) {
            log.error("websocket IO异常");
            e.printStackTrace();
        }
    }

    /**
     * 连接关闭调用的方法
     */
    @OnClose
    public void onClose() {
        webSocketSet.remove(this);  //从set中删除
        subOnlineCount();           //在线数减1
        log.info("有一连接关闭！当前在线人数为" + getOnlineCount());
    }

    /**
     * 收到客户端消息后调用的方法
     * @param message 客户端发送过来的消息
     */
    @OnMessage
    public void onMessage(String message, Session session) {
        log.info("来自客户端的消息:" + message);
    }

    /**
     * @param session
     * @param error
     */
    @OnError
    public void onError(Session session, Throwable error) {
        log.error("发生错误");
        error.printStackTrace();
    }


    public void sendMessage(String message) throws IOException {
        this.session.getBasicRemote().sendText(message);
    }


    /**
     * 群发自定义消息
     */

    public static void sendInfo(String message) throws IOException {
        for (WebsocketServer item : webSocketSet) {
            try {
                    item.sendMessage(message);
            } catch (Exception e) {
                log.info(item.session.getId()+"丢失");
                e.printStackTrace();
                continue;
            }
        }
    }

    public static synchronized int getOnlineCount() {
        return onlineCount;
    }

    public static synchronized void addOnlineCount() {
        WebsocketServer.onlineCount++;
    }

    public static synchronized void subOnlineCount() {
        WebsocketServer.onlineCount--;
    }


    public static Integer onlineCount() {
        return onlineCount;
    }
}
